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J. WILSON.

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APPLIUATIOH FILED DEG. 11, 1907. 903,038. Patented Nov. 3, 1908.

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WITNESSES INVENTOH BYW d A TTORNE YS run mmms FLTERS m wunmcmn. n c

JAMES WILSON, OF ROCHESTER, NEW YORK.

MOLD

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed December 11, 1907. Serial No. 406,006.

T 0 all whom it may concern:

Be it known that I, JAMES VVILsoN, a citizen of the United States, and aresident of Rochester, in the county of Monroe and State of New York,have invented a new and Improved Mold, of which the followin is a full,clear, and exact description.

This invention is an improvement in molds, more especially for chilledcar wheels, and has in view primarily a molding flask by which thevariation at present experienced in the thickness of flanges and theweight of the wheels, will be eliminated, and a uniform and wellbalanced wheel pro duced.

The invention further resides in novel means for holding the patterncentrally in the mold, whereby it will not be shifted when the mold istamped.

Reference is to be had to the accompanying drawings forming a part ofthis speci fication, in which similar characters of reference indicatecorresponding parts in all the views.

Figure. 1 is a central vertical section through a mold embodying myinvention, showing my improved car wheel pattern in place therein andthe molding sand filling one side of the mold; Fig. 2 is a horizontalsection substantially on the line 2 2 of Fig. 1, looking in thedirection of the arrows and Fig. 3 is a fra mental-y sectional view,showing a modifier form of the construction.

In the construction of the molding flask, I employ a molding-box or cope5, and a drag 6, in the nature of what is generally termed a Nowellring, and. an intermediate chilling-ring 7, the latter being detachablysecured to the box 5, preferably by providing each withexteriorly-extending lugs having alining apertures, through which passbolts 8. The chilling-ring 7 projects a distance within the mold, and isprovided with the usual internal molding face of the shape to form thetread and the adjacent portion of the flange of the car wheel, and isfur ther provided, as also the ring 6, with extcriorlyprojecting lugshaving alining apertures, through which pass studs 9, the studs, as bestshown in Fig. 1, being of reduced diameter and threaded at their upperends, with the lower portions thereof slightly tapering and havingcross-slots for receiving wedges 10, the latter when securely driven inplace operating to positively force the Nowell ring to thechilling-ring.

In addition to the cope, chilling-ring and Nowell ring, the mold furtherincludes a bottom board 11 having a serrated inner face, and is adaptedto be securely clamped to the top of the Nowell ring by an ordinary formof U-clamp 12, as shown in Fig. 1, or by the modified cam-clamps 13,shown in Fig. 3; the U-clamps 12 engaging suitable lugs formed on thering 6 and the margin of the bottom board, and the canrclamps eachcomprising a link 14 pivotally connecting the ring 6 with a lever 15,having a camhead adapted to engage directly with the board 11.

The car wheel pattern which I preferably use in connection with the mold is of slightly less diameter than the internal diameter of thechilling-ring in which it seats, and is provided with means for securelyholding it in concentric relation to the chilling-ring, which consistsof a plurality of radiallyarrangcd pins 16 adapted to be simultaneouslyforced through the tread of the wheel by a conical member 17, which iscentrally carried in the pattern on a longitudinally arranged screw 18,the said screw being threaded at opposite ends in plates 19 seated andsecured in recesses in the opposite faces of the pattern. The oppositeends of the screw are covered by caps 20 which form suitable depressionsin the molding sand for receiving the core.

The pins 16 are retracted when the conical member 17 is moved outwardlyby the actuation of the screw 18, by springs 21, which are located inrecesses in the perimeter of the pattern and interposed betweenenlargements formed on the pins and the outer walls of the recesses.

In the use of the mold after the pattern has been placed therein and.brought to a central position by the pins 16, the sand, or other moldingmaterial, is deposited in the Nowell ring and tamped, and thereafterleveled off with the top edge of the ring, the bottom board 11 duringthis period being removed. Forcible tamping of the sand is permittedWithout danger of shifting the pattern, in view of its rm engagementwith the chilling ring by the pins 16. The bottom board 11 can at thistime be placed in position and finally secured; the serrations thereonengaging not only the top edge of the ring 6, thus increasing itsfrictional contact, but also trictionally increases its engagement withthe sand. The mold is now in readiness to be turned over and the cope orbox 5 brought to the top, this being facilitated by trunnions 22extending from the mold at diametrically opposite points, After the sandis tamped against the pattern in the cope 5, the mold is parted forremoving the pattern between the rings (5 and T by removing the wedges10, these being the only parts of the mold which are detached inremoving the pattern preparatory to the casting operation. This I regardas an im' portant feature of my invention since it is the clamping afterthe pattern is withdrawn which distorts the mold and gives a more orless imperfect casting.

The casting surface of the chilling ring and that formed by the sand inthe Nowell ring is again brought back into perfect register by the studs9 and secured in this position, without danger of distortion, by replaeing and tightening the wedges 10. As the bottom board 11 is not removedafter the pattern is taken out, it does not relax, and when the mold isagain fastened for the pouring of the metal and mold within. an exactduplicate of the pattern is provided, which insures an approximatelyperfect casting.

The invention as shown and described while being my preferred manner ofconstruction, the same may nevertheless be modified in particularswithin the scope of the claims annexed.

Having thus described my invention I claim as new and desire to secureby Letters Patent:

1. In a mold, a wheel pattern having radi ally movable devices, andmeans for simultaneously projecting said devices to contact with themold and center the pattern therein.

2. In a wheel mold. a chilling-ring, and means for centering the patternwithin said ring.

In a mold, a car wheel pattern having radially movable devices forcentering the pattern in the mold. and a longitudinally adjustableconical member in the center of said pattern for simultancmislyprojecting said devices.

4. In a mold, a wheel pattern having radially movable devices, means forsimultaneously projecting said devices to contact with the mold andcenter the pattern therein, and means for returning said devices withinthe margin of the pattern.

In a mold, a wheel pattern having radially movable pins, springsnormally forcing said pins through the periphery of the pat.- tern, anda device at the center of the pattern for sin'iultaneously projectingsaid pins against the mold and centering the pattern therein.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES VVILSOW.

Vi itnesses:

J AMES E. STALKER, .Iossrn F. THOMAS.

